ASTM D5464 Standard Test Method for pH Measurement of Water of Low Conductivity
Данный раздел/документ содержится в продуктах:
- Техэксперт: Машиностроительный комплекс
- Картотека зарубежных и международных стандартов
- ASTM G178 Standard Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique
- 71
- ASTM G178 Standard Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique
- 71.040
- ASTM G178 Standard Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique
- 71.040.50
- ASTM G178 Standard Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique
- ISO 9241-306 Ergonomics of human-system interaction — Part 306: Field assessment methods for electronic visual displays - First Edition
- SNV SN EN ISO 11439 Gas cylinders - High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles
- ASTM G154 REV A Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
- ISO 4582 Plastics — Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources - Third Edition
- ASTM G154 REV A Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
- SNV SN EN ISO 11439 Gas cylinders - High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles
- SNV SN EN ISO 11439 Gas cylinders - High pressure cylinders for the on-board storage of natural gas as a fuel for automotive vehicles
- ASTM G154 REV A Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
- ISO 4582 Plastics — Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources - Third Edition
- ASTM G154 REV A Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
- ASTM G154 REV A Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials
- ISO 4582 Plastics — Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources - Third Edition
- ISO 4582 Plastics — Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources - Third Edition
- SNV SN EN ISO 877-3 Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using concentrated solar radiation
- ASTM D4364 Standard Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight
- ASTM D4517 Standard Test Method for Low-Level Total Silica in High-Purity Water by Flameless Atomic Absorption Spectroscopy
- ASTM D4453 Standard Practice for Handling of High Purity Water Samples
- Картотека зарубежных и международных стандартов
ASTM International
Standard Test Method for pH Measurement of Water of Low Conductivity
N D5464
Annotation
This test method is applicable to determine the pH of water samples with a conductivity of 2 to 100 ?S/cm over the pH range of 3 to 11 and is frequently used in power generation low conductivity samples. pH measurements of water of low conductivity are problematic. Specifically, this test method avoids contamination of the sample with atmospheric gases and prevents volatile components of the sample from escaping. This test method provides for pH electrodes and apparatus that address additional considerations discussed in Annex A2. This test method also minimizes problems associated with the sample’s pH temperature coefficient when the operator uses this test method to calibrate an on-line pH monitor or controller (see Appendix X1).
This test method covers the measurement of pH in water of low conductivity with a lower limit of 2.0 ?S/cm, utilizing a static grab-sample procedure where it is not practicable to take a real-time flowing sample.
NOTE 1—Test Method D5128 for on-line measurement is preferred over this method whenever possible. Test Method D5128 is not subject to the limited conductivity range, temperature interferences, potential KCl contamination, and time limitations found with this method.
For on-line measurements in water with conductivity of 100 ?S/cm and higher, see Test Method D6569.
For laboratory measurements in water with conductivity of 100 ?S/cm and higher, see Test Method D1293.
The values stated in SI units are to be regarded as standard.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
